Update Elixir and OTP versions in release workflow to 1.18.x and 27.x

Author: madawei2699

.github/workflows/release.yml

@@ -18,8 +18,8 @@ jobs:
       - name: Set up Elixir
         uses: erlef/setup-beam@v1
         with:
-          elixir-version: '1.15.x'
-          otp-version: '26.x'
+          elixir-version: '1.18.x'
+          otp-version: '27.x'
 
       - name: Install dependencies
         run: mix deps.get